(c) The direction of the attack is 58 degrees magnetic from the cross-roads in T.14.a.
Marking boards will be put out on a line 148 degrees magnetic from left flank mark, or 328 degrees magnetic from the right flank mark. Right and left flanks have been marked in advance by 2/I.G.
3. The dividing line between battalions in attack on X and Y lines is as follows:
X line. T.8.d.9.4.
Y line. Road junction T.3.d.5.2.
4. 2/I.G. will be formed up in two waves. First wave will clear up second German trench in X line.
Second wave will clear up first German trench in X line. Both these waves will clear up Y line.
Officer commanding 1st Bn. Scots Guards will make arrangements for clearing the part of these two trenches in his area.
5. The creeping barrage will open at zero hour on a line at right angles to the direction of the attack through cross-roads in T.14.a.
It will advance and halt thereafter as laid down in Appendix A to this Office No. 129/G.